Fix backspacing over attachments
Fix backspacing over attachments

basecamp/trix,GabiGrin/trix,basecamp/trix,urossmolnik/trix,urossmolnik/trix,ChenMichael/trix,GabiGrin/trix,GabiGrin/trix,urossmolnik/trix,ChenMichael/trix,ChenMichael/trix,basecamp/trix,basecamp/trix